Actually, I don't think Circo at EmuMovies is going to have a problem with someone sharing the videos amongst his paying customers; that's no big deal, especially since they already paid anyways.
For what it's worth, EmuMovies doesn't usually have problems with the site being down; I saw that earlier today, but that seems like a rare occurrence. Anyways, it does appear to be back up now.
Per FLV videos, my experience was that if the videos played in WMP, then they would play in Big Box, but I guess we've found an exception; that is odd, considering that it's using the same engine, and it fixed it for other people in the past, or at least I thought.
Do you have an active EmuMovies subscription? If so, you should be able to download MP4s now that the site is back up.